Coil-support.



I. L. GRIFFITH.

0011. SUPPORT. APPLIOATIOH FILED JAN. 10; 1908.

Patented Oct-12,1909;

WITNESSES I KTTBB N'EY UNITED sTArrss r- TENT OFFICE.

ISRAEL L. GRIFFITH, OF PITTSBTTRG, PENN MENTS, TO WESTINGHOUSE ELECTRIC PITTSBURG, PENNSYLVANIA, A CORPOR SYLVANIA, ASSIGNOR, BY MESNE ASSIGN- & MANUFACTURING COMPANY; OF EAST ATION OF PENNSYLVANIA.

COIL-SUP PORT.

Specification of Letters Patent.

Application filed January 10, 1903. Serial No: 410,230.

Patented Oct. 12, 19cc.

tor-supporting the coils of dynamo-electric machines.

The object of my invention is to provide an improved device of the class above indicated which shall effectually prevent warping or displacement of the coils to which it is applied, under mechanical and electrical strains, and-which shall maintain a high deof'insulation. f

s commonly constructed, the parts of armature coils which are not included in the core slots are subjected to tremendous strains which tend to violently distort the coils and inflict serious damage to them, in case the armature is short-circuited. This distortion may be due to the reaction, upon each other, of stray magnetic fields which are set up bythe excessive short-circuited electric currents in different sets of'armature coils, since the tendency to distortion is apparently greatest in machines of large output having comparatively.' fe'w poles, and m which the ampere turns are concentrated in a small num-- her of groups. The explanation included herein is not set forth, however, asnecessarily specifying the exact cause of coil distortion, but is merely intended as a statement of a reasonable cause .for' a. result which is unquestionable and which may be avoided by my invention,

a clamping action may be obtained not only between the ends of the clcvis but also at all points between its side bars.

Figure 1 of the accompanying drawings is an end elevation of a portion of a stationary .tors 5 which may as has been fully demonstrated in practical service. j According'to my present invention, I prosupports of the prior making the outer side vention is not restricted armature equlpped with coilsupports constructed in accordance with my invention,

and Fig. 2 is a section through a portion of the armature core which further discloses one of the coil supports shown in Fig. 1.

Referring to the drawings, a preferably laminated core structure 1 is supported by a stationary frame Q'and end plates 3 and is provided with a plurality of core slots il in which a n'iaterial part. of the winding of the machine is located.

The portion of the wimling which is outside of the core slots constitutes endconnecbe disposed in any suitable manner, a well known involute type of end connectors being illustrated. This portion of the winding is most liable to be displaced or distorted if the machine is shorbcircuited or ifcurrentdisturbanccs are otherwise produced. Consequently, coil supports are pro each having a removable side 8 which is se= cured to the end member 9 of the yoke by means of a bolt 10, the yoke itselfbeing secured to the stationary frame 2 near its ends by any suitable means, such as bolts 11.

The supports are mounted in substantially radial Jlanes and each of thein is provided with alock 12 having a plurality of notches 13 in which cross-connectors 14. may be supported. The cross-connectors serve, in a well known manner, to interconnect the different poles of the winding and are secured in the notches 13 by plates 15 which are screwed to the blocks 12. The blocks 12 may be provided with projections 16 in order to increase their capacity for supporting crossconnectors 14. Insulating, blocksjlTlmay be inserted between the outer and inner lavers of the end connectors bein su iorted t r b atone end by the windingitself and at. the other by the end member'of the clcvis.

The yokes or clevises are provided with pings 18 which insulating coatings or wra may be built up of insu readily applied before the in position on the machine.

Although I have shown my improved coil support as ap lied to .a specific winding, its use is obvious y not restricted in this regard, and itwill also be understood that my into use in connection with the windings of stationary members of ating tape and yokes are placed Titled which comprise clevises or yokes 7 electrical machines, whether generators or motors, except in so far as limitations may be imposed by the character of the winding or the service to be performed.

1 claim as my invention:

1. A coil support for electrical apparatus comprising a body member of L-shape, a removable'side member, and a clamping belt which projects through corresponding ends of the said members- 2. A coil support for electrical apparatus comprisin a. yoke or clevis having one removable slde, an insulating block and one or more bolts that project through the block and through the ends of the yoke or clevis.

3. In a dynamo-electric machine, the combination witha magnetizable core member having a plurality of slots, a winding partially ocated therein and a supporting frame therefor, of supporting means for the winding comprising a plurality of okes, and means for clamping them to the frame, each of said yokes having a removable side.

4. In a dynamo-electric machine,- the combination with a stationary slotted armature core, a supporting frame therefor, and a winding com rising a plurality of coils, portions oi whic are located in said armature slots, and other portions of which are located in planes substantially parallel to the ends of said armature core, of sup orting means for the external portions 0 said coils, said means comprising a-yoke or clevis one side of which is removable, and means for clamp ing it to the armature frame.

5. In a dynamo-electric machine, the combination with a stationary slotted armature core, asupporting frame therefor,-and a ivindin comprising a plurality of coils, portions 0 which are located in said armature slots, and other portions of which are located in planes substantially parallel to the ends of said armature core, of supporting means for external portions of said coils said means comprising a yoke one side of which is removable and one or more bolts that project through the ends of the and engage the armature frame.

6. In a dynamo-electric machine, a stationary armature,armature coils having end turns, cross-connectors between the coils of different poles, supports for the end turns which serve also as supports for the crossconnectors, said sup orts comprising a plu; rality of yokes or c evises mounted in substantially radial planes, insulating blocks and one or more bolts that project through the blocks and through the ends of the yoke and engage the core member.

In testimony whereof, I have hereunto subscribed my name this 19th day of December, 1907.

ISRAEL L. GRIFFITH. l/Vitnesses:

BENJ. M. WILLIAMS, Bnmar Hmrs.

yoke v 

